Brake for differential mechanism



Sept. 3, 1929. l 3, SMITH 1,726,591

BRAKE FOR DIFFERENTIAL mscmmsm Fild Feb. 1, 1924 2 Shets-Sheet 1 Sept.3, 1929 w, 3, SMITH I 1,726,591

BRAKE FOR DIFFERENTIAL MECHANISM Filed Feb. 1, 1924 2 Sheets-She d 2Patented Sept. -3, 1929.

UNITED STATES WILLIAM G. smrrH, or CLEVELAND, OHIO.

BRAKE FOR DIFFERENTIAL MECHANISM.

Application filed February 1, 1924. Serial No. 690,008.

The invention relates to improvements in braking, mechanism for motorcars, and the particular object is to assemble the braking mechanisminto aunitary structure with the differential mechanismof the car, insuch a manner that the braking action will; be confined thereto, andwill act jointly and simultaneously upon both divisions of the rearaxle, and by checking the movement thereof will prevent anyadvancemovement of either rear wheel and will prevent the possibility ofskidding. Also the positioning of the brake mechanism in directoperative relation with the differential mechanism and its housing, willeliminate all unusual strain upon the main propeller shaft, and willalso prevent the vibration due to theaction of the brake, from beingtransmitted to the frame.

The brake may be used singly or in connection with the ordinary brakingmechanism of the car and simultaneously therewith, if desired, and acommon source of control may be employed. i

The device comprises, aconical brakememher secured to the worm shaft, orother operating shaft of the differential mechanism, a brake drum orcomplementary brake member sleeved over said conical member andslidingly movable over said cone, a support attached to the housing ofthe differential mechanism and worm shaft, in which support said brakedrum is slidingly movable, and mechanism for operating said brake drumon said support, and for adjusting said operating mechanism.;

The invention also includes a brake cone attached to one extremity ofsaid worm shaft, said cone being provided with means for atta'chingthereto a universal joint with which 40 the main propeller shaftis'operatively connected.

g It also includes a brake cone provided with fanning meansfor producinga current of air through the brake parts, to efiect the cool- 4 ingaction thereon. j

I The invention further includes a yoke fixed upon the said housing andhaving guides thereon parallel with the axis of said worm shaft and abrake drum slidingly movable in said guides. It includes a fork passingaround said brake drum and pivoted in the sides of said yoke, and wristpins, forming said pivots,said wrist pins being provided with eccentricengaging means for said brake drum and operated to move said brake drumby the movements of said fork, and links or arms fixedly attached tosaid wrist pins and adjustable in said fork. It includes means foradjusting the positions of said links to control thethrow of saideccentrics and take up the unavoidable ,Wear upon the lining of saidbrake drum. It, includes the application of a, tension spring to take upany lost motion in the action of the eccentric pins.

It includes detachable shoes or bushings in which said eccentric pinsoperate.

It isqfurther understood that the brake i Fig. 2 is an enlarged sideelevation of the braking mechanism, Fig. 3 is an end elevation thereof,Fig. 4c is a horizontal central section ofFig. 8, Fig. 5 is aperspective of the conical brake member andFig. 6 is a perspective ofthe outer brake drum, Figs. 7 and 8 are side elevations and frontelevation respectively of the eccentric bearing wrist and link.

' In these views, A is the operating shaft for the differentialmechanism which is indicated by the letter B, C is the housing therefor,D is one portion of the divided axle, E is a yoke through which theshaft A passes This yok is rigidly secured to the housingC. Within thisyoke a conical brake member F is secured to the-extremity of theoperating shaft A by means of the nut G. Exterior to the brake cone andencircling the same is positioned the complementary brake sleeve or drumH which is supported at diametrically opposite points upon the arms ofthe yoke E.

Projecting ribs 1, I upon the brake drumat these points are'movablelongitudinally of the shaft in slots J, J in the inner sides of pinsQ,Q'atta ched to the yoke N engage, and

screws T, T provide means for adjusting the throw of the links 0, O andthe eccentric pins L,"L,-and determines the limit of the slidingmovement of the brake drum over the cone F, thus enabling it to take upthe wear upon the lining of the drum. This lining is made ofnon-inflammable material.

' f The brake rod R is attached to the lower end of an arm S on the forkN, and oscillates the i forkand eccentric pins to operate the brakedrum. V is a spring controlling the action of the brake drum.

f The brake rod may be actuated independent1yby any desired foot lever,or hand lever accessible to the driver of the car, or by air driven orhydraulic mechanism of any kind, but may work inunison with the brakerods of the Wheel brakes if it'is desired in addition to use theordinary wheel brakes of the car.

T is the non inflammable lining for the brake drum. At X, X are shownspiral, blades secured to the hub of the cone which serve as fan bladesto cause the rapid circulation of the air through the entire brakemechanism to maintain a low temperature therein.

In Fig, 4 a universal joint Y is shown "connecting the brake cone F withthe main propeller shaft W. The joint is X-shaped and 'two' arms arepivoted upon the lugs Z secured to the cone and two upon a yoke Z 'onthe shaft. V

The action of the device may be summed "up' as follows:

When itis desiredto apply the brake, power is, applied to the operatingrod R and arm S,

and the fork N is swung to opera'tethe eccentric pins L L and movetheshoes or bushings L in the vertical openings K, K, in the projectingribs I, I, upon the brake drum or sleeve H and in this manner force thebrake .drurn H into contact with the brakevcone F.

When it is desired to adjust the amount of throw of the eccentrics aswhen the parts become warm, the screw T is operated to adjust T therelative angle at which the eccentric pins stand to the bushings, thusthrowing the bushto'thejbrake cone before the brake rod is operated.

ings and the brake'drum into closer relation Having described theinvention what' I claim as new and desire to secure by-Letters Patentis:

fixed upon said housing, the sides of said,

yoke having longitudinal guides therein, a complementarybrake drumsleeved over said cone, and provided u pon opposite sides with engagingmeans'for'said guides in said yoke, a fork, opposite wrists mounted insaid fork and pivotally'mo'nnted: in said yoke, eccentricpins'inthe'ext-remities of said wrists-engage ingxmeans'therefor in thesides 'of said'brake drum, and-means for oscillating said-'forktooperate said brake drum. F 2. In a device for the'pu-rpos'e set forth,the: combination'with differential mechanismand; an 'Operatingshafttherefor, and axbousing therefor, of a conebrake memberfsecured upon oneextremity of said sha ft-,- a-yoke fixed uponsaid housing, thesidzs-Ofsaid yoke h ying longitudinal guides therein, ja complementarybrake drum sleeved-over said cone, and provided; upon opposit'e 'side'swith engaging means for said guides,:a--fo'rk, op posite wrists mountedin said fork and pivotally mounted in said yoke, eccentric pins in theextremities of said wrists, engaging means'therefor in the sides of saidbrake drum, means for oscillating said fork to operate 'sai-dbrake drum,and external link arms to which said wrists are fixedly secured, saidarms being adjustably secured for swinging movement in said fork.

combination with differential mechanism and ano-perating shaft thereforand a housing therefor, of a-cone brake member secured upon oneextremity of said shaft, a yoke fixed'upon said housing, the sides of.said

yoke having longitudinal guides therein, a complementary brake drumsleeved over said cone, and provided upon opposite sides with engagingmeans for said guides in said yoke, a fork, opposite wrists mounted insaid fork and pivotally mountedin Said yoke, eccentric pins in theextremitiesof sald wrists, engag- --1ng means therefor 1n the sides ofsaid. brake drum, means for oscillating said fork to 0pvided witharcuate slots, and said fork being provided with projecting pins engagedin said slots, and adjusting screwsonsaid arms engaging with said pins.1

4. In a device of the characterdescribed,

which said brake drum: is slidably movable, a swinging fork pivotedinsaid yokeandeccentric engaging means on the pivots of. said [fork foroperating said brake drum.

5. In a device of the character described,

3. In, a device for the purposeset forth, the

crate said brake drum, said arms being proin combination with anoperating shaft, a cone brake member thereon, a complementary brake drumsleeved thereover, a bearing for said shaft, a yoke thereon in the sidesof which said brake drum is slidably movable,

a swinging fork pivoted in said yoke and eccentric engaging means on theplvots of sald fork for operating sald brake drum, llnks mounted uponsaid pivots, and adjusting means for varying the angular positlons of 10said links and eccentrics relatively to the arms of said fork.

In testimony whereof, I hereunto set my hand this 25th day of January,1924:.

WILLIAM 0. SMITH.

